Fix: Fixes the request workflowstep

[briankane]

Description of your changes

The request workflowstep was not correctly returning response data. This fixes it to correctly wait for the response, and then sets it correctly on the response attribute.

Fixes #
kubevela/kubevela#6800

I have:

• Read and followed KubeVela's contribution process.
• Related Docs updated properly. In a new feature or configuration option, an update to the documentation is necessary. (N/A)
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary. (N/A)

How has this code been tested

Tested and detailed as part of kubevela/kubevela#6804.

Special notes for your reviewer

This affects both Workflow standalone and Kubevela.
Associated Kubevela bug: kubevela/kubevela#6800
Associated Kubevela PR (needs this merged first): kubevela/kubevela#6804

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Summary by cubic

Fixed the request workflow step so it now waits for the HTTP response and sets the response data correctly.

• Bug Fixes
  • Ensures the workflow step waits for the HTTP response before processing.
  • Correctly sets the response attribute with the returned data.

[cubic-dev-ai]

cubic reviewed 2 files and found no issues. Review PR in cubic.dev.